Internal-combustion engine.



L. COATALEN.

INTERNAL COMBUSTION ENGINEr APPLICATION FILED DEC-4,1916. II Q IL ,66 IPatented; Nov. 27, 1917.

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To all whom it may concern:

resident of Wolverhampton, in'the county of Stafiord, England, haveinvented certain new and useful Improvements in Internal-CombustionEngines, of which the following is a specification.

This invention relates to internal combustion engines, and has for itsobject to provide a simple construction which is light, and in which thenumber of large castings or parts is reduced to a minimum.

According to this invention, the water jacket of aluminium alloy isformed integral with part of the crank chamber and inside this is fitteda liner of cast iron, steel, or other suitable material, and to thewater jacket is attached a cylinder head casting r of aluminium alloywhich carries the cam shaft or cam shafts, valves, valve seatings, andthe gas passages. Preferably the liner is flanged at its upper end andthe flanges are gripped between suitable surfaces on the head andjacket.

The accompanying drawing is a central vertical section showing how theinvention may be carried into effect.

As will be seen, the upper part A of the crank chamber, which isconstructed of cast aluminium alloy, is extended up to form a completewater jacket the walls of which are shown at B these being joinedtogether at B The casting constituted by the parts A B may include anysuitable number of cylinders in line, and to it is bolted a separatecylinder head casting C also of aluminium alloy, which is provided witha water jacket C Into the jacket portion B fits, for each cylinder, aliner D of cast iron, steel or other suitable metal and this is flangedat D the flange being gripped between the head and the upper edge B? ofthe jacket. Any suitable packing material or a gasket E may be used andthe water jacket of 'fihe-head may connect with the cylinder waterjacket in any Well known manner.v

The valves F seat upon detachable seating rings G which screw into thehead casting, though they may be fixed in other ways. These seatingrings may be of steel, bronze or other suitable material and it will beseen that the gas passages H are also formed in the head casting. Loosebushes J are imeamatcomw nfq misfits.-

. Specification of Ltterisjrateit.

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o mama "sen l'na. is es fixed in casting and serve as guides for the"valve stems; *and suitable bear ings are provided for the cam shafts K.The cams K actuate the valves through rockers L which are pivoted eitherto the wall 0 of the head casting or to the detachable cover 7 plates Mthereon. Preferably the walls C extend up to the point C so as toinclose the cam shafts on the outer side and serve to catch oil. Asimilar wall may extend up on the inside, but preferably there isemployed .i separate cover plate N with its walls N extending down andserving to inclose the cam shafts on the inner side. The aperture Nserves for access to the spark ing plugs which are located centrallybetween the two valves. 1

By this means the engine construction is greatly simplified as there areonly two main castings B and C of any size, the crank chamber andcylinder water jacket forming one, and the head carrying practically allthe valve mechanism constituting the other. Previously where there hasbeen used one casting of aluminium alloy combining the main or cylinderwater jacket and the upper part of the crank chamber, and a detachablehead casting, the latter has been made of cast iron or similar material,with the result that the joint between the head and the upper surface ofthe cylinder casting was liable to become very hot and more over the twocastings expanded difierently, having different co-efticients ofexpansion. By the present invention the expansion of the two parts issimilar and the engine is much lighter. As the flange D on the liner isgripped between two cooled aluminium surfaces, it is prevented frombecoming very aluminium alloy, cam shafts carried by said head, valvesin said head, and separate valve seatings insertible into said head frombelow and fixed thereto, substantially as set forth.

2. In an internal combustion engine, the

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combination of a complete Water jacket of aluminium alloy, a crankchamber part integral therewith, a separate liner in said j aeket, acylinder head casting of aluminium alloy, cam shafts carried by saidhead, "alves in said head, separate valve seatings fixed to said head,walls extending above said cam shafts, cover plates in said Walls,rockers pivoted to said cover plates, and a cover plate, between saidcam shafts with a central aperture therein, substantially as set forth.1

, In testimony whereof I have signed my name to this specification inthe presence of two subscribing Witnesses.

LOUIS COATALEN.

Witnessesz SAMUEL BAYLLss, T. CURITON.

Copies of this patent may be ebtained tor five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

